Aguilera tunes up for the annual tree lighting ceremony in N.Y.C. Plus: Paris & Nicole reunite, Bruce Willis on set and more

1 of 17

JINGLE BELL ROCK

Christina Aguilera brings her vocal fireworks to New York's Rockefeller Center, where she rehearsed for the 74th annual Christmas tree lighting extravaganza Wednesday afternoon. The special – which also includes performances by Taylor Hicks, Sarah McLachlan and Sting – airs Wednesday at 8 p.m. ET on NBC.